We needed better data about the drying process - so we created the experiments and then ran them. Without a dryer it would take a whole day to dry off all the clothes of the house. Each run of towels removed approximately one gallon of water. We did not test any in the US. Just wanted to add that fabric matters. We are also in the process of adding a dryer to our basement. But the dryer was drying - so we asked if we could look into the crawl space..... BAD NEWS! 20' of heat during laundry periods. Obviously the further from the dryer - the less heat gain... but within six to eight feet... there was a definite gain. The dryers we tested were 4cuft in size... about half the typical US dryer. does anyone have a solution to this problem (besides using a clothesline). Lower humidity levels and keep your home cooler by properly venting your clothes dryer. You want to have your vent set up as close as you can to the outside exit. Your dryer vent hose connects to a short section of pipe that goes through the wall and sends air from your dryer to the outside. Coincidentally, he is planning to replace an old electric hot water heater with a heat-pump water heater, and this has given him an idea. Accumulated lint and dust leads the list of why laundry room fires occur far ahead of wiring problems or other issues. It’s best to vent outside, Most old houses have a trap door in the front of the house, this was for coal delivery. It is a bad idea - even if you can capture 90% of the lint. There are at least two reasons not to try this, says GBA senior editor Martin Holladay. it can vent through the wall via a small opening in the masonry with a pest flap or a gooseneck through a steel plate in the ground outside. Not only is it possible, but it's also pretty easy! Another reason for rigid pipe and insulating - we found one house where we went to check the air flow of the dryer - and nothing was coming out the duct vent. wait you have a window in your basement? Fabric Matters But most interesting - when we asked about patterns of how the dryers were used, when they did laundry... the common answer was to put the laundry on one of those devices shown at the bottom of the story above.... the preferred method of drying was a clothes line. Replacing a vent cover is simple, thanks to … I am working on a house but it has no hook-up for a dryer. I have an electric dryer in an interior utility room in my co-op. Where as we end up putting our cotton towels in the dryer (vented to the outside) sometimes, my work clothes that are largely synthetic come out of a high speed spin so dry I could almost put them in the closet (I actually have at times). The moist air diffuses from the washing machine (even front loaders) especially when the washers are dumping the waste water. It results in a noticeable gain of heat at a time you'd want to be using air conditioning. In all testing we weigh the dry, wet and post dried weights! We've looked a little bit at using the waste heat in the vent pipe during the heating season. http://wiki.diyfaq.org.uk/index.php?title=Clothes_dryer. I am curious who if anyone commissioned this study, if you are allowed to say. At the bottom of the filters there was a catch tray that caught all the excess moisture,which you were required to empty out periodically. Hold it in place using a dryer tube clamp or a piece of foil tape. That's the maximum recommended length of a dryer vent with no bends. Not all of the wax sticks to the clothing, a significant portion is vented out the duct - or - it condenses on the side of the duct with the lint. https://www.greenbuildingadvisor.com/article/how-to-vent-a-dryer Fit the dryer vent cover over the exterior opening of the venting hose pipe. Most set at 50% humidity. These appliances must be vented to the outside … The exhaust air from a gas dryer includes combustion byproducts. I was curious about venting into an attached garage until I looked up what the Code has to say. A typical laundry day could result in a homeowner misting four or five gallons of water over a short period of time into the space near the laundry washer/dryer. In short– if its a gas dryer, you are risking your life if you vent into one of those little lint boxes (usually filled with water). (Year round!). The towel cycles took approximately THREE hours to run to completion - using the manufactures recommended setting (IKEA towels). Best Strategy for a Crawlspace in a Flood Zone, http://wiki.diyfaq.org.uk/index.php?title=Clothes_dryer. After the hole is completed, get the dryer vent hood into place from the exterior of your home. Reply to Charlie Sullivan We'd log RH and temp while drying medium heat... record the time, use pin tester to confirm towels were dry... then analyze the data in the drum. You must be a magazine subscriber to access this feature. This was a relatives house - Amy and I convinced them it needed to be fixed. In all cases, venting a clothes dryer indoors is a code violation. Now - about the ventless dryers - (heat pump / condensing dryers). if it’s done right, the ducting can be relatively unobtrusive. The outcome from what we could see on the room data loggers - is that the laundry process adds humidity to the room... and it wasn't all coming from the dryer. First observation - don't expect you that you can control humidity perfectly from the washers and dryers. It is easier to clean, holds up well over the years... and lint fires should they ever happen are contained. I crack a window to let the area be vented and it is fine. The shorter the distance and fewer the … Figuring out how to install our dryer vent in the middle of our house was a bit of a challenge. We logged temperatures in side the drums while using the dryer. I won't want that fine lint in my controlled environment - especially since the final rinse almost always leaves some level of detergent in the clothes. To use foil tape, simply wrap the tape around the connecting seams. Obviously, this is a somewhat complex project which does require some amount of construction know-how. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. Having seen lots of installations I am a real believe in using rigid vent pipe, with the seams taped using 3M aluminum tape.... and to manage the heat gain into the space (hot climates) wrap the exhaust pipe in insulation!!! They are left to leak air from what ever room they are in to the outside environment - no insulation. We took showers there, changed clothes - continued tests. Also, my experience having a heat pump water heater next to where we hang our clothes in the basement is that the drying effects are overstated. The house is well insulated on the upper floors and air tight.... so a little added heat goes a long way.... in winter and during the hot summer. I have vented to one of those little lint boxes filled with water for my gas dryer for the 20 years I have lived in my brownstone. Travel, hotels, towels, labor was paid by us. “Rather than drill a hole in the side of the house for the vent,” he asks in a Q&A post at Green Building Advisor, “would it make sense to vent the hot, humid dryer exhaust into the basement? The w/d had been moved from the basement (and all connections and vent sealed off) to the middle of the house. If the dryer is against an exterior wall that is not underground, run the duct straight out from the back of the dryer. My article, Alternatives to Clothes Dryers, discusses the use of a dehumidifier to dry clothes. Insert the duct pipe on the vent hood through the hole. This solution may not be for everyone, if your looking for an easier way to vent your dryer out a window, there is a simple and easy solution. - But first the dryer sheets - they are mostly wax with some fragrance and few other chemicals on a very thin mesh. a plumber should be able to run vent duct to one of your exterior walls. (Similar to DOE procedures). For the testing in the US and Canada we used a Costco Charisma bath towel. You will see a small moisture gain. Having your dryer properly vented is crucial in keeping the appliance operating effectively and avoiding the risk of fire or water damage to your home. “I know going in that this is probably a terrible idea,” he continues, “but figured I’d ask just in case. Culik’s question is the focus for this Q&A Spotlight. About thirty different locations... nearly 150 test runs thus far. It’s best to think about moving your whole set up, the washer & dryer to a location for the outside vent and plumbing. Expect condensation and mold! You don't see that happening. The bigger problem is how to attach it to the vent hood on the exterior wall. It's simply hard to find dryers installed in peoples homes --- when you tell them we will sit there for a full day. It’s best to think about moving your whole set up, the washer & dryer to a location for the outside vent and plumbing. I would rather not have to cut a hole through the outside brick wall for the dryer vent and I would like to know if … Vent your electric clothes dryer inside in the winter! Thanks for your comment. Look at the back of your house too, often there was a small window. I went with owner to hardware store and picked up semi rigid vent pipe, lots of pipe strapping, nails, and 3M aluminum duct tape. During the summer months the waste heat from my dryer vent runs up a wall - under the master bedroom and out the side of the house. Check vents. To get it there, use a smooth, rigid metal vent pipe. I’ve heard there are contraptions that you can connect to a dryer which take out the moisture. A dryer is an essential part of the house. You can make a vent exit there. I've had my dryer venting into my home for about 8 years. About 80% of American homes are equipped with clothes dryers. The corrugated plastic dryer vent hose commonly seen on dryer vents creates a fire hazard by trapping lint in their ridges. "Improperly vented dryers and lint buildup cause over 15,000 fires a year. The dew point drops some but the temperature goes right down with it and if you don't use much hot water it's not on very much anyway. Additionally, a dryer can dry your clothes without the need for a very top-notch weather condition. Get shopping advice from experts, friends and the community! If you are in a humid climate and run dehumidifiers - expect that you've got an increased latent heat load to deal with while the laundry is ongoing. We then spent three hours in crawl space fixing the problem - coming out looking like the "lint monsters" from some Scify movie. We could not get the Costco towels (we knew ahead of time) so while in the US we had tested some IKEA towels.... that we characterized. Cindy asks, "My dryer vents into my attic. Set the vent a minimum of 12 inches above the outside ground. Dryers - venting the dryers But that is probably only a problem if the vent runs through a n unconditioned space in a cold climate. How to Attach a Clothes Dryer Vent to Blow Outside. But for many of the sites we saw the length of that dryer vent pipe was eight to twelve feet in length - and it was hot. Moving off eco - means that the resistance heater is used more often - like a standard electric dryer - and the drying times are better - but still not as fast as standard dryer. Now about dumping the warm moist air from a dryer into a house in a dry cold environment... don't do it. “And damp lint sticks to everything (with the potential of gumming up the heat pump water heater compressor).”. For those that aren't running a HRV or other ventilation system, any reason you couldn't run a dehumidifier in the room where you've hung the clothes? It's not even a gas dryer, it's electric. It would take two loads. (We have understanding friends and relatives in Germany and the UK). The majority of these are traditional hot boxes—the kind that use heat to dry clothes and pump exhaust outside through a vent. The exhaust from a conventional clothes dryer is full of moisture and lint, and the best place to vent it is directly outside. This material will quickly create moisture and dust problems for your laundry room, and even potential health problems, if it isn't vented outside. i would like to place a washer/dryer in my basement but there isnt a dryer vent or window near accesible to the dryer. The data logger for humidity was set near the fronts of the washer/dryers and we could still see a bump in humidity. Not only will you recover all the heat normally pumped outside but you'll be adding humidity to the air. Secure the dryer vent hood to the siding on the home’s exterior using wood screws We used the IKEA towels for testing in Europe and have sets in the US that we can compare against in some select dryers. It's also called a periscope dryer vent.Offset vents allow the dryer to be installed closer to the wall than a typical basement installation, using a 90 degree 4-inch duct elbow on dryer's discharge vent. The Mechanical Code has restrictions too. And yes we still saw humidity gains in to the space by the European dryers... and looking at the room and the dryers - there was this nice 35C+ box sitting in the room radiating heat for nearly eight hours (two loads)... it took twice as long to run the tests as in the US... on the heat pump dryers. Get building science and energy efficiency advice, plus special offers, in your inbox. Lint was two or three inches thick. If you would lke me to take care of this for you, I can be reached at 718-506-7621. I know that I will have to install an electrical outlet. The moisture just will not diffuse as fast and where you expect it to goi.... instead brew some tea on the stove, boil some chicken noodle soup... or simply allow more normal daily activities to add in moisture. I just recently attempted to clean out the dryer vent/duct for the downstairs unit and failed because I could not find where my dryer vent is outside. These have never seen the dryer, I haven't weighed them but I doubt there's a pound of water there. Be sure to keep the vent as direct as possible with few bends so it works well and reduces the chance for lint build up & fire. Also there is dob limit to how long your vent duct work can be. You can vent your portable air conditioner without a window, either through a dryer vent, through a drop-ceiling or a wall. Typically I'd see a three or four degree setback drop during that time. If we buy an electric dryer, does it still need to vent outside? I … A hot dryer vent hose can dump a lot of heat into a space over an eight hour laundry day. My understanding is that the reason heat pump dryers were not introduced in the us sooner is that manufacturers decided Americans would not put up with 3 hour cycle times, and the models now available here are faster. The homeowners had noticed that on laundry days - especially in the summer - it seemed that the heat pump could never keep up with the heat.... That goes back to the question in the story about venting in basement... effectively that's what was happening in this particular house. Simply disconnect the venting pipe to the outside and install a separate 4 inch aluminum flexible vent pipe. While in Europe, we also ran towel tests on clothes lines... towels outside in southern England were dry in about four hours. All the lint and stuff just comes out of the duct (looks like a slinky) and just blows on the ground and the walls. You might also want to read this British web site with information on the topic: Gas dryer In nearly all of the NE and midwest houses - there was a dehumidifier in the house - often within eight feet of the laundry machines. While emptying the dryer lint screen after every load is essential to preventing fires, a properly installed and maintained dryer vent system is also key. We also noticed a jump in particulate count when we would start the days experiment... big drums in washers and dryers stir up the air and the fine dust moves around. why not just spring for a real vent? To the extent that Peter Yost's comments imply that a homeowner might, under some circumstances, consider venting a clothes dryer indoors, you warning is important. Copyright 2016 - BlankSlate Factory, Inc. © Copyright 2021. Response to Jason D Venting your dryer to the attic is not only a potential fire hazard but can result in moisture problems which causes more problems. If it's more than 25 feet, you may have to relocate the dryer and its electrical outlet. As the gas leaves the exhausts of the dryer, it becomes concentrated indoors and can potentially poison the inhabitants of your home. We wanted to really understand the environment and the drying process. That's a no-go for me. i do believe the venting issues of gas dryers may be overestimated, but still, if i had a window in my basement …. The only exception is for some heat-pump clothes dryers and condensing clothes dryers; for these types of appliances, outdoor venting may be omitted if the manufacturer of the appliance permits it. It’s just hot air right? Jason, As noted in another thread recently, insulating the vent also helps prevent condensation inside. A while back I had a dryer that did not vent outside, The exhaust air from the dryer was diverted to the bottom of the dryer , then through a set of filters which collected the lint and the water. Your dryer should now be properly vented to the outside. Bath towels are smaller in Europe! Push the dryer … Run it to the roof or an outside wall. Thanks Dennis (Obviously, I would need to address the lint issue, but stay with me…) My thought is that this would provide ‘better’ air for the heat pump, and the heat pump would cool and dehumidify the basement. We had this same issue — noplace to vent and we were too lazy to install a vent — so we got the LG all-in-one washer-dryer with a condensation dryer — it condenses the steam and sends it down the drainpipe as water rather than vapor. A LOT!. The result was ten years of moisture and lint in the crawl space. This won't delete the articles you've saved, just the list. construction details. Most Europeans either hang the towels outside on the line -- or they simply hang the washed towels on the drying rack in the bathrooms and turn on the heat to the drying rack. Presumably this is only even a thought with an electric dryer as a gas dryer needs to vent the combustion byproducts. The fine stuff that gets by is small enough to stay airborne and make it into the lungs. Subtract 5 … Note: This is the simplest, most ideal solution. A properly functioning outside dryer vent cover is very important for any home's operation. In which case I am thinking that venting to the space below the trap door, where there is outside ventilation, will be OK. I’d love advice on this. It takes longer to dry your clothes and you have to pull them out soon after they’re done or they get kinda wrinkly, but otherwise works great. We've traveled into Canada across most of the northern US states (including NY), in the midwest, west coast and southwest where we have repeated the tests. For the most part we didn't care about energy consumption. We’ve covered this a couple of times. How can I vent it outside to make it less of a fire hazard? Insert the other end of the pipe into a dryer vent elbow and seal it with duct tape. However we did just finish testing some dryers in Europe. Birds nests, kinked hoses, clogged hoses, hoses that were off the outside connector and dumping moisture into the stud cavity. Thus the gains during the winter time are probably offset by the summer time cost of cooling to make up for the waste heat entering the home. Behind our garage a room was added on connecting to our house, so we don't have an outside vent for our dryer. That would take your valuable time and patience. For the environmental data we would look at what happened in the room when we ran the three - five loads of bath towels in a long day at the site. When the dryer is located in an indoor location adjacent to an exterior wall, which is often the case, this usually involves making an opening in the exterior wall at least 12 inches (30.48 cm) above the ground, and 12 inches (30.48 cm) from external obstructions like decks or air conditioners. While we've taken data on the heat gain in the whole area - and lots of thermal pictures of the environment - the only house that I studied the heat gain from the pipe alone - is in my house. Another observation is that when dryers are moved... the old dryer vents are often not carefully decommissioned! Did you see any installations with that problem? FAQ: Why Do Some Builders Avoid Foam Insulation. The heating season really is only two months long. Dryer exhaust systems shall be independent of all other systems and shall convey the moisture and any products of combustion to the outside of the building. But what about homes that lack space for a laundry room, or where a landlord or condo association forbids punching a hole in the wall for a dryer vent? Use as little flexible hose as necessary and stay with the rigid pipe. “The lint problem is insoluble,” he says. Then, slip the other end over the vent hood’s cap extension and secure it with a tube clamp or foil tape. (Another reason to use rigid vent pipe -- it better handles the wax/lint combination that is flammable). Slip one end of your hose over the dryer’s exhaust port. Think about it. © 2021 The Taunton Press, Inc. All rights reserved. Where space is limited, an adjustable offset dryer vent is used. I live in an older duplex. thanks. Gas dryers, without proper venting, are also capable of filling the home with carbon monoxide gas. The tests were in-situ... at homes where we would add data loggers to the room to measure moisture and the heat radiation. The maximum distance of the exhaust piping depends on the number of turns to ensure the dryer's blower motor is strong enough to push the exhaust all the way to the end of the venting. We are in the Seattle area. That plastic dryer vent should have been about 12 feet long... Years ago had water accumulate in it...tear in two and was dumping all the lint and moisture into the crawl space. I put borescope into the pipe - when back about 15 feet and suddenly the picture disappeared into a gray fog... not really water fog... just gray. You can make a vent exit there. Peter Yost indoor clothes drying Second, there’s no guarantee the water heater and the clothes dryer would be operating at the same time. Secure the vent cover to the exterior wall with screws. Response to Paul W That leads to the next conclusion - don't place your laundry washer/dryers in the master bedroom suite, upstairs or near the bedrooms if you are in a hot humid climate... you'd just need to use more air conditioning to offset the gains! Matt Culik knows this, but his particular situation makes him wonder whether there are circumstances when this rule might be broken. Position the assembly so that the opening faces toward the ground. We pin tested the hems to ensure that they were dry. You can add an additional critter cover over the dryer vent cover to prevent pests from coming in. When selling my home, the buyer's inspector said it was unacceptable and now the buyer wants me to pay to install the vent to the outside. In the UK we had a chance to test a vented dryer -- that the owner had purposely moved to a small tool shed. They also sag, further restricting airflow and trapping more and more lint over time. Second observation - dryers dump a lot of heat into the space around them. From the outside, insert the pipe into the hole. Pure heat pump cycle with out additional resistance heat - will still take a very long time (2-3 hours). … I’m guessing the air is way too wet to be properly dehumidified by the heat pump, and I’m asking for mold and general dampness problems.”. This was not an energy efficiency test. 504.1 Installation. Safety Tips for Running a Dryer Without a Dryer Vent. You can't get a six towel US bath towel load in one load. I've had success by driving four screws into the wall in a square arrangement around the vent hood and attaching two lengths of wire to the screws. To vent your dryer properly, you truly do need to send the exhaust outside. Misconception No. If you don't insulate, perhaps in hopes of using the heat in a cold climate, planning to allow condensation to drain out is wise. You can’t do this with a gas dryer, only electric. None of the comments posted in the original Q&A thread recommended that a conventional clothes dryer should be vented indoors. Dumping those combustion byproducts indoors would be stupid and potentially dangerous. Become a GBA Prime member and get full access to GBA articles, enyclopedia, videos, CAD library, and more. Sign up for a free trial and get instant access to this article as well as GBA’s complete library of premium articles and For the rest of the year the heat is either off - or the best way to provide it is by an efficient and planned HVAC system. You can use some #12 or #14 … Check the archives. For that you'd still want rigid pipe, sloped slightly down and out toward the outside wall - such that condensation will follow the pipe out. They even sell boxes with screens for this purpose. 7: Dryer vents don’t need cleaning. Nearly all of that wax is released during one dryer cycle. This was self funded (and expensive). Unmentioned is whether this is an electric or gas dryer. We consistently saw a 2 degree C, gain in room temps. Push the round opening of your new dryer vent cover onto the rim of this pipe until it sits flush against the exterior wall. Six towels typically weigh about 4.7kg dry. Exception: This section shall not apply to listed and labeled condensing (ductless) clothes dryers. Clothes dryers shall be exhausted in accordance with the manufacturer's instructions. Now for the dryer vent portion... we looked at the venting -- roughly measured the lengths and checked air flows. I vent it into the lint boxes (filled with about an inch of water), open the door to the utility room when the dryer is running and it works fine. If it's really dry enough you need to add moisture - do so with a humidifier that can measure and limit the moisture you add - to what really is needed. VOC's Even if you are not using dryer sheets. The first observation was about 40% (give a take a few %) had vent lines with problems. Can you vent an electric clothes dryer inside? Preparing the Offset Dryer Vent . Typically eight to ten hours sitting and waiting for a dryer. What about a ventless dryer? You can deploy any of these methods to vent your portable air conditioner and cool your room without putting anyone’s life in danger. Dennis thanks for sharing your results and lessons learned. Paul, I bought an existing home without an outside dryer vent. It’s best to vent outside, Most old houses have a trap door in the front of the house, this was for coal delivery. Your dryer only has the power to push that heavy, wet lint so far, so it’s inevitable that some of it is going remain behind in the vent pipe. Fires that begin from clothes dryers that are clogged with lint are second only to kitchen fires as the leading cause of home fire damage. That vented dryer completed a IKEA towel load in about 45 minutes. If you're using metal vent pipe and it's a straight run, the dryer can be up to 64 feet from the end of exhaust vent. The best way to vent a dryer is to run rigid ductwork from the dryer’s exhaust port to the outdoors. For about the last two years, my wife and I (partners in small engineering company) have been doing some rather detailed esoteric research on the clothes dryer processes.